Anyone got any ideas how Andy Green put his selfie into the game of Delta 4 - maybe he used some known techniques at the time to scan a photo, or something? Was just playing this game for a bit of fun and realized thats quite an advanced technique for the time ..

Well, back in the days there was already things like the "handy scanner", I even remember some magazines articles on how to turn your printer into a 1 bit scanner by adding a sensor on the printer head.